Question about Zenith Z50PX2D 50 in. Plasma HDTV
Control board located behind the AV input board
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Posted on Sep 15, 2010
Do not attempt to do a trial job as you will end up changing all the boards beccoming uneconomical.
So as you have noticed that the set powers up with an errror as the microprocesor connects the fan to start up because of an excessive current drain.
So power it up and try to check physically for suspected components in the convergence , drive sections heating up. disconnect and check if the set powers up.
Checck for electrolytic capacitors that have reduced in value or shorted so that the mail rail votage is not maintained. Use a parallel capacitor to confirm.
Nothing better than to go step by step by disconnection of the +B voltage-- since you ahve a new power supply- to see if the fault changes.
IF there is no visible fault in the power section then a possible data error or mP malfunctioning must be looked into.
Check in the mP for correct voltage of +5, check crystal and components aroundd this section.
Do nott replace unless you are confident or seek opinion.
Posted on Sep 14, 2010
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Posted on Jan 02, 2017
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